Column form



W. G. VENARD June 8, 1948.

COLUMN FORM Filed June 10, 1945 INVENTOR. W/W/am 6. l/enara' 6.2L; LQMA, my

Patented June 8, 1948 NT} OFFICE.

COLUMN Fomu l William G. Venard, San Francisco, Calif. Application June 10, 1946, Serial No. 675,535

1 Claim. (01.25-131) This invention relates to improvements in column clamping forms and has particular reference to a form for the building of concrete columns.

The principal object of this invention is to provide a form and clamp therefor which may be used over and over again, thus saving the cost of lumber and also the cost of erecting the customary nailed structure as well as the tearing down of the same.

A further object is to produce a structure wherein columns of various sizes as far as crosssectional area is concerned may be made by using the same forms.

A still further object is to produce a device of this character which is economical to manufacture, simple to use and one which will conform to standard practices of column construction, that is as to reinforcing, pouring of concrete, etc.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of a portion of a column showing two of my forms in superimposed position.

Fig. 2 is a top plan view of one of the form sections, and

Fig. 3 is a fragmentary exploded View of the parts of my form.

In the building of columns it has been customary to nail to ether rectangular frames which serve to hold in position upright boards to form a hollow square, into which the necessary reinforcing bars are placed and the concrete poured. Considerable time is required for the erection of these forms inasmuch as the various boards must be sawed to proper length and fitted so that there will be no leakage of concrete; then after the concrete has set the boards must be ripped oif with consequent loss of the lumber due to breakage.

I have therefore devised a form which may be easily adjusted to produce hollow squares of various areas within the capacity of the form, and by placing several of these forms one upon the other a column of any desired height may thus be built. After use the various parts may be disassembled without loss of material and used over and over again.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numerals 5, 6, I

and 8 refer to form boards of'any desired size, each being provided with a pair of angularly disposed reinforcing channels, as shown at 9 and II.

The lower end of these channels are flush with the bottom of the board but the upper ends of these extend above the tops of the boards, the purpose of which will be later seen.

These boards are assembled in end to side relation as shown in Fig. 2 so as to provide a form rectangular in shape, but capable of adjustment as to size of the hollow square formed thereby. Attached to the bottom of each form board is a spacer strip which forms a notched end to accommodate the clamps to be later described. This spacer is changed for columns of different cross-sectional areas and is the only part of the form which must be cut for the particular size of the column being formed.

In order to hold these boards in rectangular position I provide two sets of clamping members, one positioned adjacent the lower extremity of the boards and the other adjacent the upper extremity, and as both sets of clamps are identical, but one will be described. The upper set will be described as a whole by the letter A and the lower set by the letter B.

Each clamping set consists of the assemblage of four (4) sets of like parts, each set consisting of an angular member I2 formed of channeled material so as to receive the end of a compression bar l3 having an elongated slot l4 which is adapted to register with a slot [6 through which passes a wedge H, which wedge is held against accidental withdrawal by a pin I 8.

A series of openings l9 formed in the opposite end of the bar I3 from th slot l4 permits the adjustment of the next corner angular member 12 through the medium of a pin [5. Such an adjustment is obvious and requires no further discussion.

It will therefore be apparent that by assembling four angular members and their compression bars about the boards 5, 6, I and 8 so that they will bear against the angularly disposed channels 9 and II and by adjusting the pins IS in the proper openings and then tightening the whole structure through the tapping of the wedges a compression will be exerted which will hold all of the boards in proper position.

The form thus made can be placed upon the top of a similar form, as shown in Fig. 1, and a column of any desired height may be constructed. When the column is to support a girder an individual form of the usual construction is built up and placed upon the top of one of my forms, as shown at C.

After the concrete in the column has set, by removing the pins l5 or by knocking the wedges loose, the various parts of the clamps may be disassembled and the boards removed and reused wherever desired.

It will thus be seen that I have produced a form clamp which accomplishes all of the objects above setforth. V c

It is to'be' understoodthat the form of rriyinvention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material,

Having thus described my invention, 'I'k'ilaiin:

A column form comprising a lurality of boards arranged in end-to-side relation to form an =spacer" alndthe upper' efidwbf "said channels extending above the tops'bfsaid form boards.

WILLIAM G. VENARD.

REFERENCES CITED The following references are of record in the "*IJ'NiTfiD sTATEs PATENTS Number Name Date 20 1,160,212 Symons Nov,16, 1915 1331396 Ea-ones Fb} 11-4920 

